@article{MA2019, 
author = {Hong MA},
title = {Effect observation of onlays on the posterior teeth with subgingival defects after deep margin elevation},
year = {2019},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {27},
number = {9},
pages = {582-585},
keywords = {molar, tooth defect, deep margin elevation, resin, all-ceramic onlay, margin sealing property, periodontal health, secondary caries},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2019.09.007},
doi = {10.12016/j.issn.2096-1456.2019.09.007},
abstract = {ObjectiveTo evaluate the effect of repairing posterior teeth with subgingival defects with onlays after deep margin elevation and to provide a reference for clinical application.MethodsEighty-six cases of posterior teeth with subgingival defects were treated with resin filling to elevate the subgingival margin to the superior gingival margin and were then restored with onlays of cast porcelain. Patients were followed up at 1 week, 6 months and 12 months. The wear and tear of the restorations, fractures of the restorations, loss of the restorations, marginal closeness, marginal staining, secondary caries and gingival health were examined. Assessment of efficacy with reference to American public health service standards was conducted.ResultsOne week after the operation, there was no loss of follow-up. Eightysix cases of onlays had no prosthetic wear, prosthetic fracture, prolapse of the prosthesis, edge adhesion, edge coloration, secondary caries, etc., and the gums were healthy. At 6 months after surgery, 2 patients were lost to follow-up and 4 of the remaining 84 onlays were detached. After re-adhesion, there was no shedding. At 12 months after surgery, 5 cases were lost to follow-up and 81 cases of onlays demonstrated no further prosthetic wear, prosthetic fracture, prolapse of the prosthesis, edge adhesion, edge coloration, secondary caries, etc., and the gums were healthy. The success rate after 12 months of repair was 95.1% (77/81).ConclusionFor posterior teeth with a subgingival defect, onlays of cast porcelain have the advantages of a high success rate, convenient clinical operation and no influence on periodontal health to restore posterior teeth after deep margin elevation.}
}